Just wondering if anyone has uses swaddlebee fleece covers and how they are? and how they compare to other fleece covers?

Also, can someone explain fleece to me, I get wool, but I really don't get how a fleece cover can work better than a pul. I understand about it being more breathable but not how it is better for leaking.

I am getting ready to try fitteds and fleece covers for night-time and just want to understand it better.

I have a SB fleece cover, and I really like it. I haven't tried it for nighttime, but it's working great for daytime! I love fleece covers.
Fleece works similar to the way wool works. It sort of repels the moisture and keeps it contained in the fitted. It is difficult for the wetness to penetrate the fleece, especially if you're using heavyweight fleece.